>Submitter-Id: net
>Originator: Randolph Chung
>Organization: Debian
>Confidential: no
>Synopsis: [3.3 regression] inline optimization ICE
>Severity: serious
>Priority: medium
>Category: optimization
>Class: ice-on-legal-code
>Release: 3.3 20030309 (Debian prerelease) (Debian testing/unstable)
>Environment:
System: Linux gsyprf11.external.hp.com 2.4.20-pa18-UP #1 Sat Jan 4 22:06:52 PST
2003 parisc64 unknown unknown GNU/Linux
Architecture: parisc64
<machine, os, target, libraries (multiple lines)>
host: hppa-unknown-linux-gnu
build: hppa-unknown-linux-gnu
target: hppa-unknown-linux-gnu
configured with: ../src/configure -v
--enable-languages=c,c++,f77,objc,ada,treelang --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-gxx-include-dir=/usr/include/c++/3.3 --enable-shared --with-system-zlib
--enable-nls --without-included-gettext --enable-__cxa_atexit
--enable-sjlj-exceptions --enable-clocale=gnu --enable-debug --enable-objc-gc
hppa-linux
>Description:
see below; code works with gcc-3.2.3
This is extracted from allegro. It is similar but not the same as
optimization/9768
>How-To-Repeat:
gcc-3.3 -O2 -c bug.c
--------------------8< bug.c 8<-------------------
extern int * allegro_errno;
typedef long fixed;
extern inline int fixfloor (fixed x) { if (x >= 0) return (x >> 16); else
return ~((~x) >> 16); }
extern inline int fixtoi (fixed x) { return fixfloor(x) + ((x & 0x8000) >> 15);
}
extern inline fixed ftofix (double x) { if (x > 32767.0) { *allegro_errno = 34;
return 0x7FFFFFFF; } if (x < -32767.0) { *allegro_errno = 34; return
-0x7FFFFFFF; } return (long)(x * 65536.0 + (x < 0 ? -0.5 : 0.5)); }
extern inline double fixtof (fixed x) { return (double)x / 65536.0; }
extern inline fixed fixdiv (fixed x, fixed y) { if (y == 0) { *allegro_errno =
34; return (x < 0) ? -0x7FFFFFFF : 0x7FFFFFFF; } else return ftofix(fixtof(x) /
fixtof(y)); }
extern inline fixed itofix (int x) { return x << 16; }
int foo(int n) { return fixtoi(fixdiv(itofix(512), itofix(n))); }
--------------------8< bug.c 8<-------------------
>Fix:
unknown
